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DeltaScanBuilder

delta_arrow_reader

Struct DeltaScanBuilder 

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pub struct DeltaScanBuilder<'table> { /* private fields */ }
Expand description

Configures one single-use streaming Delta scan.

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impl<'table> DeltaScanBuilder<'table>

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pub fn with_projection( self, logical_columns: impl IntoIterator<Item = impl Into<String>>, ) -> Self

Selects visible logical columns in caller order.

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pub fn with_predicate(self, predicate: DeltaPredicate) -> Self

Replaces the exact logical row predicate.

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pub const fn with_limit(self, limit: usize) -> Self

Sets the maximum number of output rows.

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pub fn with_target_partitions( self, target_partitions: usize, ) -> Result<Self, DeltaReaderError>

Overrides the number of planned scan partitions.

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pub const fn with_execution_options( self, execution_options: DeltaScanExecutionOptions, ) -> Self

Replaces the execution settings for this scan.

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pub async fn build(self) -> Result<DeltaScan, DeltaReaderError>

Builds one immutable single-use scan plan.

Planning loads Delta metadata. If network warmup did not finish during table loading, an eligible filtered scan also makes one bounded recovery attempt. See WarmupMode. Reads that produce query results begin when the scan’s stream is polled.

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impl<'table> !RefUnwindSafe for DeltaScanBuilder<'table>

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impl<'table> !UnwindSafe for DeltaScanBuilder<'table>

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impl<'table> Freeze for DeltaScanBuilder<'table>

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impl<'table> Send for DeltaScanBuilder<'table>

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impl<'table> Sync for DeltaScanBuilder<'table>

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impl<'table> Unpin for DeltaScanBuilder<'table>

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impl<'table> UnsafeUnpin for DeltaScanBuilder<'table>

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